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;; hostn))
(db #f) ;; (open-db)) ;; we don't want the server to be opening and closing the db unnecesarily
(hostname (get-host-name))
(ipaddrstr (let ((ipstr (if (string=? "-" hostn)
;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
(server:get-best-guess-address hostname)
#f)))
(if ipstr ipstr hostn))) ;; hostname)))
(start-port (if (and (args:get-arg "-port")
(string->number (args:get-arg "-port")))
(string->number (args:get-arg "-port"))
(if (and (config-lookup *configdat* "server" "port")
(string->number (config-lookup *configdat* "server" "port")))
(string->number (config-lookup *configdat* "server" "port"))
(+ 5000 (random 1001)))))
(link-tree-path (config-lookup *configdat* "setup" "linktree")))
(set! *cache-on* #t)
(root-path (if link-tree-path
link-tree-path
(current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!
(handle-directory spiffy-directory-listing)
;; http-transport:handle-directory) ;; simple-directory-handler)
;; Setup the web server and a /ctrl interface
;;
(vhost-map `(((* any) . ,(lambda (continue)
;; open the db on the first call
(if (not db)(set! db (open-db)))
(let* (($ (request-vars source: 'both))
(dat ($ 'dat))
(res #f))
(cond
;; This is the /ctrl path where data is handed to the server and
;; responses
((equal? (uri-path (request-uri (current-request)))
'(/ "ctrl"))
(let* ((packet (db:string->obj dat))
(qtype (cdb:packet-get-qtype packet)))
(debug:print-info 12 "server=> received packet=" packet)
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;; hostn))
(db #f) ;; (open-db)) ;; we don't want the server to be opening and closing the db unnecesarily
(hostname (get-host-name))
(ipaddrstr (let ((ipstr (if (string=? "-" hostn)
;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
(server:get-best-guess-address hostname)
#f)))
(if ipstr ipstr hostn))) ;; hostname)))
(start-port (if (and (args:get-arg "-port")
(string->number (args:get-arg "-port")))
(string->number (args:get-arg "-port"))
(if (and (config-lookup *configdat* "server" "port")
(string->number (config-lookup *configdat* "server" "port")))
(string->number (config-lookup *configdat* "server" "port"))
(+ 5000 (random 1001)))))
(link-tree-path (config-lookup *configdat* "setup" "linktree")))
(set! db *inmemdb*)
(root-path (if link-tree-path
link-tree-path
(current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!
(handle-directory spiffy-directory-listing)
;; http-transport:handle-directory) ;; simple-directory-handler)
;; Setup the web server and a /ctrl interface
;;
(vhost-map `(((* any) . ,(lambda (continue)
;; open the db on the first call
;; This is were we set up the database connections
(let* (($ (request-vars source: 'both))
(dat ($ 'dat))
(res #f))
(cond
((equal? (uri-path (request-uri (current-request)))
'(/ "api"))
(send-response body: (api:process-request db $) ;; the $ is the request vars proc
headers: '((content-type text/plain)))
(mutex-lock! *heartbeat-mutex*)
(set! *last-db-access* (current-seconds))
(mutex-unlock! *heartbeat-mutex*))
;; This is the /ctrl path where data is handed to the server and
;; responses
((equal? (uri-path (request-uri (current-request)))
'(/ "ctrl"))
(let* ((packet (db:string->obj dat))
(qtype (cdb:packet-get-qtype packet)))
(debug:print-info 12 "server=> received packet=" packet)
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;;======================================================================
;;======================================================================
;; C L I E N T S
;;======================================================================
(define *http-mutex* (make-mutex))
;; (system "megatest -list-servers | grep alive || megatest -server - -daemonize && sleep 4")
;; <html>
;; <head></head>
;; <body>1 Hello, world! Goodbye Dolly</body></html>
;; Send msg to serverdat and receive result
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;;======================================================================
;;======================================================================
;; C L I E N T S
;;======================================================================
(define *http-mutex* (make-mutex))
(define *http-requests-in-progress* 0)
(define *http-connections-next-cleanup* (current-seconds))
(define (http-transport:get-time-to-cleanup)
(let ((res #f))
(mutex-lock! *http-mutex*)
(set! res (> (current-seconds) *http-connections-next-cleanup*))
(mutex-unlock! *http-mutex*)
res))
(define (http-transport:inc-requests-count)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*))
;; Use this opportunity to slow things down iff there are too many requests in flight
(if (> *http-requests-in-progress* 5)
(begin
(debug:print-info 0 "Whoa there buddy, ease up...")
(thread-sleep! 1)))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count proc)
(mutex-lock! *http-mutex*)
(proc)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count-and-close-all-connections)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(let loop ((etime (+ (current-seconds) 5))) ;; give up in five seconds
(if (> *http-requests-in-progress* 0)
(if (> etime (current-seconds))
(begin
(thread-sleep! 0.05)
(loop etime))
(debug:print 0 "ERROR: requests still in progress after 5 seconds of waiting. I'm going to pass on cleaning up http connections"))
(close-all-connections!)))
(set! *http-connections-next-cleanup* (+ (current-seconds) 10))
(mutex-unlock! *http-mutex*))
(define (http-transport:inc-requests-and-prep-to-close-all-connections)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))
;; This next block all imported en-mass from the api branch
(define *http-requests-in-progress* 0)
(define *http-connections-next-cleanup* (current-seconds))
(define (http-transport:get-time-to-cleanup)
(let ((res #f))
(mutex-lock! *http-mutex*)
(set! res (> (current-seconds) *http-connections-next-cleanup*))
(mutex-unlock! *http-mutex*)
res))
(define (http-transport:inc-requests-count)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*))
;; Use this opportunity to slow things down iff there are too many requests in flight
(if (> *http-requests-in-progress* 5)
(begin
(debug:print-info 0 "Whoa there buddy, ease up...")
(thread-sleep! 1)))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count proc)
(mutex-lock! *http-mutex*)
(proc)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(mutex-unlock! *http-mutex*))
(define (http-transport:dec-requests-count-and-close-all-connections)
(set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
(let loop ((etime (+ (current-seconds) 5))) ;; give up in five seconds
(if (> *http-requests-in-progress* 0)
(if (> etime (current-seconds))
(begin
(thread-sleep! 0.05)
(loop etime))
(debug:print 0 "ERROR: requests still in progress after 5 seconds of waiting. I'm going to pass on cleaning up http connections"))
(close-all-connections!)))
(set! *http-connections-next-cleanup* (+ (current-seconds) 10))
(mutex-unlock! *http-mutex*))
(define (http-transport:inc-requests-and-prep-to-close-all-connections)
(mutex-lock! *http-mutex*)
(set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))
;; (system "megatest -list-servers | grep alive || megatest -server - -daemonize && sleep 4")
;; <html>
;; <head></head>
;; <body>1 Hello, world! Goodbye Dolly</body></html>
;; Send msg to serverdat and receive result
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#t)) ;; (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
;; (set! numretries (- numretries 1))
;; #t))
;; send the data and get the response
;; extract the needed info from the http data and
;; process and return it.
(let* ((send-recieve (lambda ()
(mutex-lock! *http-mutex*)
(set! res (with-input-from-request
fullurl
(list (cons 'dat msg))
read-string))
(close-all-connections!)
(mutex-unlock! *http-mutex*)))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-send-receive serverdat msg numretries: (- numretries 1))
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#t)) ;; (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
;; (set! numretries (- numretries 1))
;; #t))
;; send the data and get the response
;; extract the needed info from the http data and
;; process and return it.
(let* ((send-recieve (lambda ()
;; (let ((dat #f)
;; (cleanup (http-transport:get-time-to-cleanup)))
;; (if cleanup
;; (begin
;; (debug:print-info 0 "Running cleanup mode")
;; (http-transport:inc-requests-and-prep-to-close-all-connections))
;; (http-transport:inc-requests-count))
;; ;; Do the actual data transfer
(mutex-lock! *http-mutex*) ;; Hypothesis is that this was *not* the bottleneck
(set! res (with-input-from-request ;; was set! dat
fullurl
(list (cons 'dat msg))
read-string))
(close-all-connections!)
(mutex-unlock! *http-mutex*)
))
;;(if cleanup
;; ;; mutex already set
;; (begin
;; (set! res dat)
;; (http-transport:dec-requests-count-and-close-all-connections))
;; (http-transport:dec-requests-count
;; (lambda ()
;; (set! res dat)))))))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-send-receive serverdat msg numretries: (- numretries 1))
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(thread-terminate! th2)
(debug:print-info 11 "got res=" res)
(let ((match (string-search (regexp "<body>(.*)<.body>") res)))
(debug:print-info 11 "match=" match)
(let ((final (cadr match)))
(debug:print-info 11 "final=" final)
final)))))))
(define (http-transport:client-connect iface port)
(let* ((login-res #f)
(uri-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/ctrl"))))
(serverdat (list iface port uri-dat)))
(set! login-res (client:login serverdat))
(if (and (not (null? login-res))
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " iface ":" port)
(set! *runremote* serverdat)
serverdat)
(begin
(debug:print-info 0 "ERROR: Failed to login or connect to " iface ":" port)
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(thread-terminate! th2)
(debug:print-info 11 "got res=" res)
(let ((match (string-search (regexp "<body>(.*)<.body>") res)))
(debug:print-info 11 "match=" match)
(let ((final (cadr match)))
(debug:print-info 11 "final=" final)
final)))))))
;; Send "cmd" with json payload "params" to serverdat and receive result
;;
(define (http-transport:client-api-send-receive serverdat cmd params #!key (numretries 30))
(let* ((fullurl (if (list? serverdat)
(cadddr serverdat) ;; this is the uri for /api
(begin
(debug:print 0 "FATAL ERROR: http-transport:client-send-receive called with no server info")
(exit 1))))
(res #f))
(handle-exceptions
exn
(begin
;; TODO: Send this output to a log file so it isn't lost when running as daemon
(print "ERROR IN http-transport:client-send-receive " ((condition-property-accessor 'exn 'message) exn))
(thread-sleep! 2)
(if (> numretries 0)
(http-transport:client-api-send-receive serverdat cmd params numretries: (- numretries 1))))
(begin
(debug:print-info 11 "fullurl=" fullurl "\n")
;; set up the http-client here
(max-retry-attempts 5)
;; consider all requests indempotent
(retry-request? (lambda (request)
#t)) ;; (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
;; (set! numretries (- numretries 1))
;; #t))
;; send the data and get the response
;; extract the needed info from the http data and
;; process and return it.
;; (with-input-from-request "http://localhost/echo-service"
;; '((test . "value")) read-string)
(let* ((send-recieve (lambda ()
;; (let ((dat #f)
;; (cleanup (http-transport:get-time-to-cleanup)))
;; (if cleanup
;; (http-transport:inc-requests-and-prep-to-close-all-connections)
;; (http-transport:inc-requests-count))
;; ;; Do the actual data transfer NB// KEPP THIS IN SYNC WITH http-transport:client-send-receive
(mutex-lock! *http-mutex*)
(set! res (with-input-from-request ;; was dat
fullurl
(list (cons 'key "thekey")
(cons 'cmd cmd)
(cons 'params params))
read-string))
;; Shouldn't this be a call to the managed call-all-connections stuff above?
(close-all-connections!)
(mutex-unlock! *http-mutex*)
))
;; (if cleanup
;; ;; mutex already set
;; (begin
;; (set! res dat)
;; (http-transport:dec-requests-count-and-close-all-connections))
;; (http-transport:dec-requests-count
;; (lambda ()
;; (set! res dat)))))))
(time-out (lambda ()
(thread-sleep! 45)
(if (not res)
(begin
(debug:print 0 "WARNING: communication with the server timed out.")
(mutex-unlock! *http-mutex*)
(http-transport:client-api-send-receive serverdat cmd params numretries: (- numretries 1))
(if (< numretries 3) ;; on last try just exit
(begin
(debug:print 0 "ERROR: communication with the server timed out. Giving up.")
(exit 1)))))))
(th1 (make-thread send-recieve "with-input-from-request"))
(th2 (make-thread time-out "time out")))
(thread-start! th1)
(thread-start! th2)
(thread-join! th1)
(thread-terminate! th2)
(debug:print-info 11 "got res=" res)
res)))))
(define (http-transport:client-connect iface port)
(let* ((login-res #f)
(uri-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/ctrl"))))
(uri-api-dat (make-request method: 'POST uri: (uri-reference (conc "http://" iface ":" port "/api"))))
(serverdat (list iface port uri-dat uri-api-dat)))
(set! *runremote* serverdat) ;; may or may not be good ...
(set! login-res (rmt:login))
(if (and (list? login-res)
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " iface ":" port)
(set! *runremote* serverdat)
serverdat)
(begin
(debug:print-info 0 "ERROR: Failed to login or connect to " iface ":" port)
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(if (and (string? tmo)
(string->number tmo))
(* 60 60 (string->number tmo))
;; default to three days
(* 3 24 60 60)))))
(debug:print-info 2 "server-timeout: " server-timeout ", server pid: " spid " on " iface ":" port)
(let loop ((count 0))
(thread-sleep! 4) ;; no need to do this very often
;; NB// sync currently does NOT return queue-length
(let () ;; (queue-len (cdb:client-call server-info 'sync #t 1)))
;; (print "Server running, count is " count)
(if (< count 1) ;; 3x3 = 9 secs aprox
(loop (+ count 1)))
;; Check that iface and port have not changed (can happen if server port collides)
(mutex-lock! *heartbeat-mutex*)
(set! sdat *runremote*)
(mutex-unlock! *heartbeat-mutex*)
(if (or (not (equal? sdat (list iface port)))
(not spid))
(begin
(debug:print-info 0 "interface changed, refreshing iface and port info")
(set! iface (car sdat))
(set! port (cadr sdat))
(set! spid (tasks:server-get-server-id tdb #f iface port #f))))
;; NOTE: Get rid of this mechanism! It really is not needed...
;; (open-run-close tasks:server-update-heartbeat tasks:open-db spid)
(tasks:server-update-heartbeat tdb spid)
;; (if ;; (or (> numrunning 0) ;; stay alive for two days after last access
(mutex-lock! *heartbeat-mutex*)
(set! last-access *last-db-access*)
(mutex-unlock! *heartbeat-mutex*)
;; (debug:print 11 "last-access=" last-access ", server-timeout=" server-timeout)
(if (and *server-run*
(> (+ last-access server-timeout)
(current-seconds)))
(begin
(debug:print-info 0 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
(loop 0))
(begin
(debug:print-info 0 "Starting to shutdown the server.")
;; need to delete only *my* server entry (future use)
(set! *time-to-exit* #t)
(open-run-close tasks:server-deregister-self tasks:open-db (get-host-name))
(thread-sleep! 1)
(debug:print-info 0 "Max cached queries was " *max-cache-size*)
(debug:print-info 0 "Number of cached writes " *number-of-writes*)
(debug:print-info 0 "Average cached write time "
(if (eq? *number-of-writes* 0)
"n/a (no writes)"
(/ *writes-total-delay*
*number-of-writes*))
" ms")
(debug:print-info 0 "Number non-cached queries " *number-non-write-queries*)
(debug:print-info 0 "Average non-cached time "
(if (eq? *number-non-write-queries* 0)
"n/a (no queries)"
(/ *total-non-write-delay*
*number-non-write-queries*))
" ms")
(debug:print-info 0 "Server shutdown complete. Exiting")
(exit)))))))
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(if (and (string? tmo)
(string->number tmo))
(* 60 60 (string->number tmo))
;; default to three days
(* 3 24 60 60)))))
(debug:print-info 2 "server-timeout: " server-timeout ", server pid: " spid " on " iface ":" port)
(let loop ((count 0))
;; Use this opportunity to sync the inmemdb to db
(let ((start-time (current-milliseconds))
(sync-time #f)
(rem-time #f))
(if *inmemdb* (db:sync-tables (db:tbls *inmemdb*) *inmemdb* *db*)) ;; (db:sync-to *inmemdb* *db*))
(set! sync-time (- (current-milliseconds) start-time))
(debug:print 0 "SYNC: time= " sync-time)
(set! rem-time (quotient (- 4000 sync-time) 1000))
(if (and (< rem-time 4)
(> rem-time 0))
(thread-sleep! rem-time)))
;; (thread-sleep! 4) ;; no need to do this very often
(if (< count 1) ;; 3x3 = 9 secs aprox
(loop (+ count 1)))
;; Check that iface and port have not changed (can happen if server port collides)
(mutex-lock! *heartbeat-mutex*)
(set! sdat *runremote*)
(mutex-unlock! *heartbeat-mutex*)
(if (or (not (equal? sdat (list iface port)))
(not spid))
(begin
(debug:print-info 0 "interface changed, refreshing iface and port info")
(set! iface (car sdat))
(set! port (cadr sdat))
(set! spid (tasks:server-get-server-id tdb #f iface port #f))))
;; NOTE: Get rid of this mechanism! It really is not needed...
;; (open-run-close tasks:server-update-heartbeat tasks:open-db spid)
(tasks:server-update-heartbeat tdb spid)
;; (if ;; (or (> numrunning 0) ;; stay alive for two days after last access
(mutex-lock! *heartbeat-mutex*)
(set! last-access *last-db-access*)
(mutex-unlock! *heartbeat-mutex*)
;; (debug:print 11 "last-access=" last-access ", server-timeout=" server-timeout)
(if (and *server-run*
(> (+ last-access server-timeout)
(current-seconds)))
(begin
(debug:print-info 0 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
(loop 0))
(begin
(debug:print-info 0 "Starting to shutdown the server.")
;; need to delete only *my* server entry (future use)
(set! *time-to-exit* #t)
(if *inmemdb* (db:sync-tables (db:tbls *inmemdb*) *inmemdb* *db*)) ;; (db:sync-to *inmemdb* *db*))
(open-run-close tasks:server-deregister-self tasks:open-db (get-host-name))
(thread-sleep! 1)
(debug:print-info 0 "Max cached queries was " *max-cache-size*)
(debug:print-info 0 "Number of cached writes " *number-of-writes*)
(debug:print-info 0 "Average cached write time "
(if (eq? *number-of-writes* 0)
"n/a (no writes)"
(/ *writes-total-delay*
*number-of-writes*))
" ms")
(debug:print-info 0 "Number non-cached queries " *number-non-write-queries*)
(debug:print-info 0 "Average non-cached time "
(if (eq? *number-non-write-queries* 0)
"n/a (no queries)"
(/ *total-non-write-delay*
*number-non-write-queries*))
" ms")
(debug:print-info 0 "Server shutdown complete. Exiting")
(exit))))))
;; all routes though here end in exit ...
(define (http-transport:launch)
(if (not *toppath*)
(if (not (setup-for-run))
(begin
(debug:print 0 "ERROR: cannot find megatest.config, exiting")
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(debug:print-info 2 "NOT starting new server, one is already running on " (vector-ref hostinfo 1) ":" (vector-ref hostinfo 2))
(if *toppath*
(let* ((th2 (make-thread (lambda ()
(http-transport:run
(if (args:get-arg "-server")
(args:get-arg "-server")
"-"))) "Server run"))
(th3 (make-thread http-transport:keep-running "Keep running"))
(th1 (make-thread server:write-queue-handler "write queue")))
(thread-start! th2)
(thread-start! th3)
(thread-start! th1)
(set! *didsomething* #t)
(thread-join! th2))
(debug:print 0 "ERROR: Failed to setup for megatest")))
(exit)))
;; (use trace)
;; (trace http-transport:keep-running
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(debug:print-info 2 "NOT starting new server, one is already running on " (vector-ref hostinfo 1) ":" (vector-ref hostinfo 2))
(if *toppath*
(let* ((th2 (make-thread (lambda ()
(http-transport:run
(if (args:get-arg "-server")
(args:get-arg "-server")
"-"))) "Server run"))
(th3 (make-thread http-transport:keep-running "Keep running")))
;; (th1 (make-thread server:write-queue-handler "write queue")))
(set! *cache-on* #t)
(set! *db* (open-db))
(set! *inmemdb* (open-in-mem-db))
(db:sync-tables (db:tbls *db*) *db* *inmemdb*) ;; (db:sync-to *db* *inmemdb*)
(thread-start! th2)
(thread-start! th3)
;; (thread-start! th1)
(set! *didsomething* #t)
(thread-join! th2))
(debug:print 0 "ERROR: Failed to setup for megatest")))
(exit)))
;; (use trace)
;; (trace http-transport:keep-running
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